AVION Travel Trailers

Just noticed the 110V/12V lights are not showing anything. Are those bulbs? Replaceable? The other lights such as tanks, LP, battery seem to light up

Do you have a pic showing which you are referring to? Different years have different panels.

I do

I believe that “Power On” light may have been powered by a 12v wire attached to an “Accessory” fuse in the original 12v fuse box. I could be wrong, but I believe there was a relay that kicked in when powered to 120v, which then fed juice via that 12v wire to the control panel. Systems upgraded with a newer converter won’t have that design. In your case, possible causes could be that the wire is disconnected, the accessory fuse is blown or removed, or as you suggested the light is burned out.

As far as the 12v kill switch, disconnect from shore power and make sure the 12v kill switch breaker on the monitor panel is on. If the monitor panel light works it will glow. It’s purpose is to show you are operating on 12v only.

If it doesn’t glow, turn on a light fixture to see if you are getting 12v. Assuming the light fixture works, then you can probably assume the 12v monitor panel light is bad, or there’s a problem between the monitor panel light and what comes before it.

So the 12v kill switch should be in the off position when on shore power? I thought I had read something about it needing to be on so that batteries would charge

No, it should stay in the on position when connected to shore power.

The only time you would turn it off is if you want to isolate the batteries from any potential 12v drain.